package com.itheima.reggie.controller;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.fasterxml.jackson.databind.ser.Serializers;
import com.itheima.reggie.common.BaseContext;
import com.itheima.reggie.common.R;
import com.itheima.reggie.entity.ShoppingCart;
import com.itheima.reggie.service.ShoppingCartService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.*;

import java.time.LocalDateTime;
import java.util.List;

@RestController
@RequestMapping("/shoppingCart")
@Slf4j
public class ShoppingCartController {
    @Autowired
    private ShoppingCartService shoppingCartService;


    //添加到购物车
    @PostMapping("/add")
    public R<ShoppingCart> add(@RequestBody ShoppingCart shoppingCart)
    {
        Long currentId = BaseContext.getCurrentId();
        shoppingCart.setUserId(currentId);

        Long dishId = shoppingCart.getDishId();

        LambdaQueryWrapper<ShoppingCart>lqw=new LambdaQueryWrapper<>();
        lqw.eq(ShoppingCart::getUserId,currentId);

        if(dishId!=null)
        {
            lqw.eq(ShoppingCart::getDishId,dishId);
        }
        else
        {
            lqw.eq(ShoppingCart::getSetmealId,shoppingCart.getSetmealId());
        }

        ShoppingCart cartServiceOne = shoppingCartService.getOne(lqw);

        if(cartServiceOne!=null)
        {
            Integer number = cartServiceOne.getNumber();
            cartServiceOne.setNumber(number+1);
            shoppingCartService.updateById(cartServiceOne);
        }
        else
        {
            shoppingCart.setNumber(1);
            shoppingCart.setCreateTime(LocalDateTime.now());

            shoppingCartService.save(shoppingCart);
            cartServiceOne = shoppingCart;
        }
        return R.success(cartServiceOne);


    }

    //查看购物车
    @GetMapping("/list")
    public R<List<ShoppingCart>> list()
    {
        log.info("查看购物车");
        LambdaQueryWrapper<ShoppingCart>lqw=new LambdaQueryWrapper<>();

        lqw.eq(ShoppingCart::getUserId, BaseContext.getCurrentId());
        lqw.orderByAsc(ShoppingCart::getCreateTime);

        List<ShoppingCart> list = shoppingCartService.list(lqw);
        return R.success(list);
    }

    //清空购物车
    //
    @DeleteMapping("/clean")
    public R<String> clean()
    {
        LambdaQueryWrapper<ShoppingCart> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(ShoppingCart::getUserId,BaseContext.getCurrentId());

        shoppingCartService.remove(queryWrapper);
        return R.success("清空购物车成功");
    }

}
